linux-kernel - RE: [PATCH 1/1] TPM: STMicroelectronics ST33 I2C

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Message-ID: <35286B1AE75A7C47BFF0870081A31B4B3A991CD8BC@SAFEX1MAIL4.st.com>
Date:	Mon, 19 Nov 2012 14:48:22 +0100
From:	Mathias LEBLANC <Mathias.LEBLANC@...com>
To:	Kent Yoder <key@...ux.vnet.ibm.com>
Cc:	Rajiv Andrade <mail@...jiv.net>,
	Marcel Selhorst <tpmdd@...horst.net>,
	Sirrix AG <tpmdd@...rix.com>,
	"tpmdd-devel@...ts.sourceforge.net" 
	<tpmdd-devel@...ts.sourceforge.net>,
	Debora Velarde <debora@...ux.vnet.ibm.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jean-Luc BLANC <jean-luc.blanc@...com>
Subject: RE: [PATCH 1/1] TPM: STMicroelectronics ST33 I2C

Hi Kent,

Which is the version of your kernel?
The tpm_continue_selftest function (declare in tpm.c) seems to be different in the kernel 3.x.x .
I will send a patch for the  2.6.x and 3.x.x

regards,

Mathias Leblanc
________________________________________
From: Kent Yoder [key@...ux.vnet.ibm.com]
Sent: 14 November 2012 23:06
To: Mathias LEBLANC
Cc: Rajiv Andrade; Marcel Selhorst; Sirrix AG; tpmdd-devel@...ts.sourceforge.net; Debora Velarde; linux-kernel@...r.kernel.org; Jean-Luc BLANC
Subject: Re: [PATCH 1/1] TPM: STMicroelectronics ST33 I2C

Hi Mathias,

On Wed, Nov 14, 2012 at 03:31:42PM +0100, Mathias Leblanc wrote:
>  * STMicroelectronics version 1.2.0, Copyright (C) 2010
>  * STMicroelectronics comes with ABSOLUTELY NO WARRANTY.
>  * This is free software, and you are welcome to redistribute it
>  * under certain conditions.
>
> This is the driver for TPM chip from ST Microelectronics.
>
> If you have a TPM security chip from STMicroelectronics working with
> an I2C, in menuconfig or .config choose the tpm driver on
> device --> tpm and activate the protocol of your choice before compiling
> the kernel.
> The driver will be accessible from within Linux.
>
> Tested on linux x86/x64, beagleboard REV B & XM REV C and CHROMIUM OS

  Getting some build errors here:

drivers/char/tpm/tpm_stm_st33_i2c.c: In function ‘__check_interrupts’:
drivers/char/tpm/tpm_stm_st33_i2c.c:615:1: warning: return from
incompatible pointer type [enabled by default]
drivers/char/tpm/tpm_stm_st33_i2c.c: In function ‘__check_power_mgt’:
drivers/char/tpm/tpm_stm_st33_i2c.c:619:1: warning: return from
incompatible pointer type [enabled by default]
drivers/char/tpm/tpm_stm_st33_i2c.c: In function ‘tpm_st33_i2c_probe’:
drivers/char/tpm/tpm_stm_st33_i2c.c:725:3: warning: suggest parentheses
around arithmetic in operand of ‘|’ [-Wparentheses]
drivers/char/tpm/tpm_stm_st33_i2c.c: In function
‘tpm_st33_i2c_pm_suspend’:
drivers/char/tpm/tpm_stm_st33_i2c.c:826:3: error: too many arguments to
function ‘tpm_pm_suspend’
In file included from drivers/char/tpm/tpm_stm_st33_i2c.h:55:0,
                 from drivers/char/tpm/tpm_stm_st33_i2c.c:35:
                 drivers/char/tpm/tpm.h:326:12: note: declared here
                 drivers/char/tpm/tpm_stm_st33_i2c.c: In function
                 ‘tpm_st33_i2c_pm_resume’:
                 drivers/char/tpm/tpm_stm_st33_i2c.c:855:3: error:
                 implicit declaration of function
                 ‘tpm_continue_selftest’
                 [-Werror=implicit-function-declaration]

[cut]
> +/*
> + * _wait_for_interrupt_serirq_timeout
> + * @param: tpm, the chip description
> + * @param: timeout, the timeout of the interrupt
> + * @return: the status of the interruption.
> + */
> +static int _wait_for_interrupt_serirq_timeout(struct tpm_chip *chip,
> +                                             unsigned long timeout)
> +{
> +     int status;
> +     struct i2c_client *client;
> +     struct st33zp24_platform_data *pin_infos;
> +
> +     client = (struct i2c_client *) chip->vendor.iobase;
> +     pin_infos = client->dev.platform_data;
> +
> +     status = wait_for_completion_interruptible_timeout(
> +                                     &pin_infos->irq_detection,
> +                                             timeout);

  status should be a long here.

[cut]
> +
> +     if (client == NULL) {
> +             pr_info("client is NULL. exiting.\n");
> +             err = -ENODEV;
> +             goto end;
> +     }
> +
> +     if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
> +             pr_info("client not i2c capable\n");
> +             err = -ENODEV;
> +             goto end;
> +     }
> +
> +     chip = tpm_register_hardware(&client->dev, &st_i2c_tpm);
> +     if (!chip) {
> +             pr_info("fail chip\n");

  Please use dev_info() in place of pr_info().

Thanks,
Kent
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